This report is the second deliverable of Task 6.1 (Hazard and Reliability Aspects), Task 6.2 (Health & Safety Aspects) and Task 6.3 (Environmental Aspects). It presents an update of the Failure Mode, Effects and Criticality Analysis (FMECA) and of the the HAZard IDentification (HAZID) of the PivotBuoy system. This report builds on the assessments reported in the deliverable D6.1 “Identification of failure modes and initial reliability, health & safety and environmental assessment of the PivotBuoy system” [Ref 1], which was issued in September 2019.
A general objective of Work Package 6 is to identify critical failure modes and de-risk the development of the PivotBuoy system. This is achieved by means of a continuous process of risk identification, evaluation and mitigation during the project lifecycle. Deliverable 6.1 presented an initial technology assessment and initial FMECA based on the design definition achieved dring the first months of the PivotBuoy project. These initial assessments allowed the design team to focus their efforts on eliminating (‘designing out’) significant risks.
The FMECA has been updated frequently during the engineering phase as and when new design data has become available. Key milestones in this process have been the Detailed Design Reviews (DDR) during which the designs have been presented to and discussed amongst the broader PivotBuoy consortium team.
In addition to these formal reviews, numerous FMECA sessions have been held with focus on a particular system component or sub-component. The responsible engineers for these components have contributed actively during these sessions. The updated FMECA register is included in this report as an appendix. This FMECA register reflects the design status as of mid-June 2020. In addition to the FMECA, an initial HAZID of the offshore transportation and installation methodology was performed in conjunction with the DDR2 session. The hazards identified during this session will be addressed in the installation procedures.
Deliverable D6.3, to be issued at the end of the project will present a further update on reliability, health and safety and environmental assessments of the system.